explain to all of us what is that. and attorney general eric holder said last march that it was constitutional to kill americans abroad if they were posing a threat of violent attacks. so explain how all of this meshes together. >> sure, exactly. well, first of all, the strike against anwar awlaki, both were killed in 2011. got a lot of attention because they were both american citizens, had never been charged with crimes, and raising the question, what is the u.s. government's authority to kill an american citizen, who has full constitutional protections, the same ones you and i do? and the justice -- it has been reported that the justice department's office of legal counsel, its official arbitrator of legal advice for the executive branch wrote a memo that laid out the legal justifications for targeted killings of americans who were believed to be al qaeda leaders. but that has never been made public. and there's been a lot of clamor from both the news media and members of congress to see what are the legal justifica